--- service: i.root-servers.net start-period: '2015-09-24T00:00:00Z' end-period: '2015-09-25T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4062598276 dns-udp-queries-received-ipv6: 314770592 dns-tcp-queries-received-ipv4: 27556257 dns-tcp-queries-received-ipv6: 451363 dns-udp-responses-sent-ipv4: 4007645475 dns-udp-responses-sent-ipv6: 314978806 dns-tcp-responses-sent-ipv4: 27533620 dns-tcp-responses-sent-ipv6: 455454